CO2 bottle with 1/4 turn valve, Williams standard weight regulator, with large barb threaded in, large hose, with hose clamp.
Note that the large hose coming from the regulator goes into the end of the MAV-2 valve. One valve has a T fitting for the hose coming from the regulator, and another hose going to the second MAV-2. The second MAV-2 has only an L fitting, (or one could simply thread in a large barb if there enough room). The smaller barbs come out the side of the MAV-2 valves to supply air to the cannons. I always install the clamps on all hoses.
